Construction of roof of open-hearth and reverberatory furnaces.



FURNACES.

G. C. CARSON. CONSTRUCTION OF ROOFS F OPEN HEARTH AND BEVERIBERATORYAPPLICATION FILED JUNE 75, l9 l b Patented Apr. 29, I919.

mwwmn 5 855552 28 E5 E5 BE 5528 can D U n n- U u ml U W F m M A z m w mD D U U E: EESEFSU S5 555E ESFUEFEQEESU l-lllllr M H H H H enonancarrrnnm. caasort', or salt raarqcrsco, canrroamn.

CONSTRUCTION 01E ROOF 01E OPEN-HEAETH AND BEVERBEMTORY FURNACES.

soasor.

. Y Specification of Letters Patent.

Original application filed January 15, 1907, Serial No. stance. Dividedand this application flied June at, 1915. Serial No. 38,498.

i To all whom it may concern:

Be it known that I, GEORGE CAMPBELL CARsoN, a citizen of the UnitedStates, who resides at 89 Broadway street, San Francisco, California,have invented a new and useful Improvement in the Construction of Roofsof Open-Hearth and Reverberatory Furnaces.

My invention relates to the construction of the roof and walls so thatthe material used to protect the walls of the furnace fromthe scorifyingof the bath within the furnace is char ed upon the furnace floor andalong the urnace walls through ports that deliver it along the interioragainst the Walls and .prevents the bath of molten material fromscorifying the interior of the furnace structure.

I support the roof of the furnace upon brackets which relieve thefurnace walls from the burden of the roof and the stresses caused byexpansion and contraction due to varying temperatures within thefurnace.

When the material fed into the furnace is of such a nature as to fluxthe silica of the roof z. 6. roll scale, iron ore, or other materialused to produce-steel, or calcines containing basic oxids I providewater cooled blocks for the ports or passages through which the materialis fed into the furnace thus preventing it from coming into contact withthe silica in the roof.

A great saving is made by leaving out all of the masonry of the sidewalls and allowing the smelting charge that passes through the feedports to pile upon the floor and against a plate which forms the outsideof the furnace. For further advantages of this invention I refer toapplication No. 352,468, series. of 1900, filed by me January 15th,1907, and eventuating into Patent, Number 1,149,495, of Aug. 10, 1915,of which this is a divisional application for Letters Patent.

The invention is further described by reference to the accompanyingdrawings: Figure 1, is a cross section of the furnace show ing portsthrough which the material is fed into the furnace and the manner thatthe charge protects the masonry of the side walls by forming theembankment .0. upon the floor and alongthe walls. Fig. 2 shows thecharge in the furnace resting upon the floor against a .steel plate andthe water cooled blocks through which the charge has dropped togetherwith the brackets support- Patented t. as, rare.

skew bricks which makes the roof'stronger by piercing the walls with theports instead of the arch when the roof is supported upon masonryinstead of brackets. Like letters refer to like parts in all figures.

In all figures A. is the roof of the furnace. B. is the ports orpassages through which the material is fed into the furnace. C. is

the material within the furnace'fed through the feed ports, E. arebrackets supporting the roof, and F. are water cooled blocks. G. areplates supporting the smelting, or re fractory charge.

Having thus fully described my invention what I claim as new and desireto secure by Letters Patent is 1. In a furnace roof for open-hearth andreverberatory furnaces, having chargin ports around the outer edgesthereof; sai

ports being made of metal cooling blocks that serve the purposes ofprotecting said roofs from the scorification of materials fed throughsaid ports, and stresses caused by varying temperatures within saidfurnaces. 2. The method of protecting the walls of an open hearth orreverberatory furnace which consists in .feeding the ores or fettlingmaterials into the furnace chamber near the upper part thereof, and incausing the same to form a sloping embankment resting upon the floor ofthe furnace chamber and along the walls within the chamber between thebath and walls.

3. In an open hearth or reverberatory furnace, a floor, walls extendingupwardly from the floor, and feeding ports leading into the upper partof the furnace chambep and being so located that the ores or fettllngmaterials entering therethrough may have unrestriated vertical movementdownwardly to the said floor near the walls and may form slopingembankments against the walls to protect the latterfrom the heat andcorrosive action of the metal bath.

GEORGE CAMPBELL mason.

Witnesses:

I Tnos. S. Cameraman,

En. Conn.

DISCLAIMER- 1,302,307 .--Ge0rge Campbell Carson, San Francisco, Calif.CONSTRUGIION or a or OPEN-HEART}! AND REYERBERATORY FURNACES. Patentdated April 29,1919. Disclaimer filed March 29, 1922, by the patentee.Hereby make disclaimer of the following parts of the claims andspecification of said Letters Patent No. 1,302,307, and which yourpetitioner accordingly 'desirestoerase,viz: i

l (1) The words or fettling materials in claim two' (2) at the end ofline 84 and beginning of line 85. I

(2) The words orfettling materials in claim three 3) at the end ofline95 and beginning of line'96. Y V r 1 i (3) The words or refractoryat'the end of line 69 and beginning of line 70 of the specification. i c

jA ll of which is .Without prejudice to residue left after expunging theabove specifiedwordaf I Y [-OficiaZGazctZe Apfil 11, 1.922.]

DISCLAIMER. 1,02,'307.- G0rge Campbell Carson, San Francisco; Calif,Consmnorrofi or Roor or Oran-HEART}: AND Rnvminnm'romr FURNACES. Patentdated April 29, 3" i919. Disclaimer filed September 15, 1922, by thepatentee. I i Q Hereby makes-1 disclaimer to slich interpretation of theword ores, which ap-.

pears in claims two (2) and three (3) of saidLetters Patent as wouldmakeit include silica orlsilicious ores used as fettling material, said wordores to have .its usual acceptedmeaningofQsmeItingrw 0 7mm GazetteSeptember as, 1922.

